Related Experiment Videos
The effect of nitric oxide on bacteria
Applied Microbiology
|May 1, 1962
Summary
Nitric oxide shows no antibacterial effect. However, sodium nitrite and sodium nitrate can stimulate bacteria, with nitrous acid formation being key to changes in cured meat
Area of Science:
- Food microbiology
- Nitrogen compound chemistry
Background:
- Nitrogen oxides are common in food processing.
- Understanding their antibacterial properties is crucial for food safety.
Purpose of the Study:
- To evaluate the antibacterial effects of nitric oxide and other nitrogen oxides.
- To investigate the role of nitrous acid in the bacterial flora of cured meats.
Main Methods:
- Assaying antibacterial action of nitric oxide, sodium nitrate (NaNO3), and sodium nitrite (NaNO2).
- Proposing a pH-dependent "nitrite cycle" model.
Main Results:
- Nitric oxide exhibited negligible antibacterial activity.
- Sodium nitrate and sodium nitrite showed neutral to stimulatory effects on bacteria.
- Nitrous acid formation was identified as the primary driver of bacterial changes in cured meat.
Conclusions:
- Nitrous acid, not nitric oxide, is responsible for significant alterations in cured meat's bacterial composition.
- A pH-dependent "nitrite cycle" explains nitrous acid production in cured meat systems.